MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix78:EF:4C:00:00:00 /24
Vendor address101-511, Digital Empire2, 486, Shin-dong, Youngtong-gu Suwon Kyonggi-do KR 443-390
Country🇰🇷 South Korea
RegisteredApr 19, 2011
Block range78:EF:4C:00:00:00– 78:EF:4C:FF:FF:FF
Address capacity16,777,216
AdministrationUniversally administered: its prefix comes from a block registered through the IEEE Registration Authority
TransmissionUnicast: addressed to a single device
SourceIEEE Registration Authority
Address capacity is the size of this registered block, not a count of devices actually manufactured or online. Registration identifies the organization holding the block, not a specific device model or unit.
Curious how a prefix like this turns into a full address? See how MAC addresses are structured →
Example addresses in this block
Where this block sits
UNETCONVERGENCE CO., LTD holds 2 registered blocks in the IEEE registry, ranking #3,321 of 33,427 organizations by block count.